Improvement in dovetailing-machine



To all 'whom it may concern r anni anni.

J'osnPHoILL, or GRAND RAPIDS, MICHIGAN.

Lette/rs Patent No. 106,922, dated August 30, 1870.

Be it known that I, JO'SE'PH DILL, of Grand Rapids, iu the county ofKentand State of Michigam have invented a new and -useful Improvement inGroovin'g and Dovetailing-Machines; and I do here declare the'followinglto be a clear and correct description of the same, suiicient to enableother's skilled inthe class to whiclimy invention appertains to fullyunderstand and' use the' same, reference being had to theac'conipauyingdrawing .which makes part of this specification, and in whichi Figure lis a plan view of my improved machine with the carriage removed, and

Fig-ure 2 is au end view of th'e same with the carria-ge in place.

Like letters of reference indicate like parts in both figures.

l he nature ofmy invention consists in the arrauge' vmeut of threecircular saws,placed one behind the vother, their centers being in thesame horizontal line, .two of the saws being in an inclined position,and having the cutting-edges of their teeth beveled, to ru'n parallelwith the cutting-edges ofthe the teeth of the -third saw, which isvertical, and consists ofone' or a .-'Set of several saws, as may herequired by the width of the dovetail groove to he cut.A

A in the drawing represents the frame of the machine, on which thecarriage B slides in the usual manner.

Longitudinal pieces C O, suitably fastened to the frame A, are providedwith slots, in which slide the bearings d e f of the circular saws D EF,which bearings, besides being made adjustable laterally, may beadjustable vertically, also, by'set-screws, or any other well-knowndevices.

'lhe hearings otsaws D and E are inclined in opposite directions,l sothat the saws are themselves inclined to thesame degree, but in oppositedirections.

- The cutting-edges oi' these saws are beveled off, so as to be parallelto the cutting-edges of saw F, which latter hangs perfectlyperpendicular, or vas nearly so as in practice can he accomplished. Thislatter; saw F may consist of one single saw, or a set of several saws,may hev required fof 'the width of thev dovctail groove.

Thus, I am enabled to make any sized groove, from one-sixteenth, or evena thirty-second part of an inch, to two inches or more, merely varyingthe size or numher'oi` saws F.

Were' the saws placed i-n line, side by\` side, they would cut too lwidea groove for any practical use, and couldnot possibly make a small-dovetail groove for line work.-

I am aware of a patent granted to O. Ohlemacher and 0. Kremer, datedMarch 9, 1869, in vwhich three saws cut a complete dovetail, and this Ido not claim; but

'What I claim as new, and desire to secure: by Letters Patent, is-

The arrangement of the circular saws D E F, when constructed andoperating as herein shown and described.

JOSEPH DILL.-

VVituesses:

BENJAMIN A. WILLIS, HENRY WH1T1AkER,J|-.

